OP-40

Ovation’s OP-40 preamp leaves other electronics in the dust. It features 3-band EQ with a bypass switch, a Mid-Shift control for selecting a midrange center frequency of either 400 Hz or 900 Hz, a Pre-Shape circuit for boosting bass and treble response while cutting rumble-prone frequencies below 40 Hz, and a battery status light. An ultra-steep sweepable notch filter lets you surgically cut feedback without affecting the guitar’s overall tone. Equipped with an easy-to-read LED array, the onboard chromatic tuner works for standard, open, or altered tunings, and can be calibrated to non-standard reference pitches.